Grip for a writing instrument



FIG. 1 is a front elevational view of a grip for a writing instrument showing my new design, the rear being the same in appearance as the front;

FIG. 2 is a right side elevational view thereof, the left side being the same in appearance as the right side; and,

FIG. 3 is a top plan view thereof, the bottom being the same in appearance as the top.

The broken line showing of a writing instrument in FIGS. 1 and 2 is environmental only and forms no part of the claimed design. 

The ornamental design for a grip for a writing instrument, as shown and described. 